Brake shoe



Sept. 3, 1929. G; J, TH MAS 1,726,998

BRAKE SHOE Filed Feb. "21. 1927 INVENTOR J. TH

"ATTO NEY GEORGE Patented Sept. 3, 1929.

,UNITED STATES PATENT oFFicE.

GEORGE JOSEPH THOMAS, OF SOUTH BEND, INDIANA, ASSIGNOR TO BENDIX BRAKE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION ILLINOIS.

BRAKE SHOE.

Application filed February 21, 1927. Serial No. 169,873.

This invention relates to brake shoes, and is illustrated as embodied in a shoe for an internal expanding automobile brake. An object of the invention is to provide simplified and positive means for laterally positioning the free end of the shoe, by forming it with spaced flanges or other parts engag-' ing opposite sides of a cam or equivalent brake-applying device.

Preferably a thrust roller or the like is mounted in the recess thus formed in the end of the shoe, for operative engagement with the cam, the flanges projecting past the roller on opposite sides to embrace the cam between them.

Other objects and features ofthe invention, including various novel combinations ofparts and desirable details of construction, will be apparent from the following description of one illustrative embodiment shown in the accompanying drawing, in which:

' Figure 1 is a vertical section through the brake, just inside the head of the brake drum, and showing the brake shoes in side elevation;

Figure 2 is a partial section on the line 2-2 of Figure 1, showing the novel roller mounting; and a Figure 3 is a section through one of the shoes, on the line 33 of Figure 1.

The illustrated brake includes a rotatable drum 10, at the open side of which is ar- I ranged a suitable support such asa backing plate 12, and within which are arranged three brake shoes, viz: an auxiliary shoe 14 anchored on a pivot 16 carried by the backing plate, a secondary shoe 18 anchored on a pivot 20 carried by the backing plate, and

floating pivot 24.

Shoes 14 and 22 are shown forked at their lower ends to straddle opposite ends of shoe 18 against the drum against the resistanceof an auxiliary spring 34.

Each shoe, as best shown in Figure 3, may

a primary shoe 22 connected to shoe. 18 by a present invention, flanges 40 of each of the shoes 14 and 22 are spread apart at the upper end of the shoe to form a recess, in which is arranged a thrust member such as a roller 42 operatively engaging the-cam 28, and shown as pivotally mounted on a pin 44 pressed into tubular sleeves 46 drawn in opposite directions from flanges 40. It will be seen, however, that flanges 40 project beyond I roller 42 on opposite sides, to embrace cam 28 between them and position the shoe laterally. P1n 44 is shouldered at its ends, to

will not bind against the roller 42.

While one illustrative embodiment has been described in detail, it is not my intention to limit the scope of the invention to that particular embodiment, or otherwise than by the te'rms of the appended claims.

I claim: v

1. A brake shoe comprising two parts having portions spaced apart at one end of the shoe, and a thrust member mounted between said portions, said portions projecting beyond said member on opposite sides.

2. A brake shoe having two flanges secured together and jointly forming a stifl'ening web; and spread apart at one end of the shoe to form a recess, in combination with a thrust roller in the recess pivotally mounted on said'flanges, said-flanges projecting be- 'space flanges 4O rigidly apart so that they yond the roller on opposite sides at the ex treme end of the shoe.

3. A brake shoe having two flanges se-' cured together and jointly forming a stiffening web, and spread apart at one end of the.

shoe to form a recess, in combination with a thrust member in the recess, said flanges projecting beyond said member on opposite at one end to form a pair of spaced flanges, I0

sides at the extreme end of the shoe. a pin extending between the flanges and 4.-. A brake shoe having at oneen'd-a pair shouldered at its ends to space them rigidly of. spaced flanges, a pin extending between apart, and a roller on the pin between the 5 the flanges and shouldered at its ends to flanges.

space them rigidly apart, and a roller on the In testimony whereof, I have hereunto pin between the flanges. signed my name.

5. A brake shoe built up of a pair of stampings secured together and spread apart GEORGE JOSEPH THOMAS. 

